Relevant bibliographies by topics / Polymer Nano-films

Academic literature on the topic 'Polymer Nano-films'

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Published: 6 September 2023

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Journal articles on the topic "Polymer Nano-films"

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Elmlund, Louise, Subramanian Suriyanarayanan, Jesper G. Wiklander, Teodor Aastrup, and Ian A. Nicholls. "Biotin selective polymer nano-films." Journal of Nanobiotechnology 12, no. 1 (2014): 8. http://dx.doi.org/10.1186/1477-3155-12-8.

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Liu, Shengda, Jiayun Xu, Xiumei Li, Tengfei Yan, Shuangjiang Yu, Hongcheng Sun, and Junqiu Liu. "Template-Free Self-Assembly of Two-Dimensional Polymers into Nano/Microstructured Materials." Molecules 26, no. 11 (May 31, 2021): 3310. http://dx.doi.org/10.3390/molecules26113310.

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In the past few decades, enormous efforts have been made to synthesize covalent polymer nano/microstructured materials with specific morphologies, due to the relationship between their structures and functions. Up to now, the formation of most of these structures often requires either templates or preorganization in order to construct a specific structure before, and then the subsequent removal of previous templates to form a desired structure, on account of the lack of “self-error-correcting” properties of reversible interactions in polymers. The above processes are time-consuming and tedious. A template-free, self-assembled strategy as a “bottom-up” route to fabricate well-defined nano/microstructures remains a challenge. Herein, we introduce the recent progress in template-free, self-assembled nano/microstructures formed by covalent two-dimensional (2D) polymers, such as polymer capsules, polymer films, polymer tubes and polymer rings.
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Yuan, Jun, Qi Xin Zheng, and Jian Cheng. "Fabrication, Characterization and Adsorptive of Human Fibrinogen of HA/PHBV Nano Composite Films." Advanced Materials Research 160-162 (November 2010): 1325–30. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.1325.

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In this investigation, nano-scale hydroxyapatite (HA) particles were incorporated in poly(hydroxybutyrate-co-valerate) (PHBV) polymer to fabricate composite films using solvent casting method. The morphologies, mechanical properties and adsorptive of human fibrinogen of the composite films were investigated. The HA nano-particles were dispersed in the films and well bonded to the polymer. The strength of films could be enhanced and its adsorptive of human fibrinogen could be also improved greatly by introducing HA nano-particles into the films. The results suggested these newly developed nano-HA/PHBV composite films might serve as an effective biomedicine material.
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Ghosh, S., and Arpita Ray. "Silver nano particles from low dilution homeopathic medicine." American Journal of Applied Bio-Technology Research 2, no. 1 (January 1, 2021): 34–48. http://dx.doi.org/10.15864/ajabtr.215.

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Recently there have been many attempts for the biosynthesis of silver or gold nano particles from plant (root, leaves, stem etc.) extracts. In the present article, we have shown, for the first time, that low dilution China or Cina (Homeopathic medicines both of strength theta) can also dissociate AgNO3 producing Ag nanoparticles. We have stabilized these Ag nanoparticles in some bioactive polymers (like polyvinyl alcohol ,PVA) and studied their electrical and dielectric properties. Enhancement of conductivity and dielectric constants of these Ag stabilized polymer nanocomposite films compared to those of the corresponding pure polymer films indicated the presence of Ag nanoparticles in the films.
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Dabbaghianamiri, Maedeh, Sayantan Das, and Gary W. Beall. "Improvement Approach for Gas Barrier Behavior of Polymer/Clay Nanocomposite Films." MRS Advances 2, no. 57 (2017): 3547–52. http://dx.doi.org/10.1557/adv.2017.458.

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ABSTRACTPolymer nanocomposites (PNC) include a copolymer or polymer which has nanoparticles dispersed in the polymer matrix at the nano-level. One of the most common types of polymer nanocomposites contain smectic clays as the nanoparticles. These clay minerals increase the mechanical properties of standard polymers and improve barrier properties. For optimum barrier properties, Layer-by-Layer assembly (LbL) is one of the most effective methods for depositing thin films. LbL methods however, are quite tedious and produce large quantities of waste. A newly discovered phenomenon of self-assembled polymer nanocomposites utilizes entropic forces to drive the assembly to spontaneously form a larger nanostructured film. This approach allows polymers and nanoparticles with high particle loadings to be mixed, and create the super gas barrier films. We have developed a coating technique which can be employed to make self-assembled gas barrier films via inkjet printing. This technique is industrially scalable and efficient. This is because it does not need any rinsing step and drying steps as required in LbL. The influence of different polymers Polyvinylpyrrolidone (PVP) and Poly (acrylic acid) PAA with Montmorillonite (MMT) nanoclay solutions on Polyethylene terephthalate (PET) substrate is examined to study their effectiveness as a gas barrier film. The results showing the excellent oxygen barrier behavior of a combination of PVP and MMT Nano clay nanocomposite with high transparency. These high barrier gas nanocomposite films are good candidates for a variety of food packaging applications.
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Reddy, T. Ramesh, Bhooshan Muddam, A. R. Subrahmanyam, J. Siva Kumar Kumar, M. Ravindar Reddy, and K. Venkata Ramana. "Effect of TiO2 Nanoparticles on Structural and Optical Properties of Poly pyrrole, Poly vinyl alcohol Polymer Blend Thin Films." Oriental Journal Of Chemistry 38, no. 3 (June 30, 2022): 796–800. http://dx.doi.org/10.13005/ojc/380335.

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Thin films of (Poly Pyrrole - Poly Vinyl Alcohol) PPY-PVA polymer blend doped with different concentration of TiO2 nano particles were prepared via oxidative chemical polymerization technique (in-situ). The properties (Structural & Optical) of these thin films were studied by XRD, FTIR, SEM and UV spectroscopic techniques. The optical band gap values of TiO2 doped polymer blend were calculated by UV spectroscopic studies, and also noticed that obtained band gap values were decreased with increase in the concentration of TiO2 nano particles. XRD and FTIR results support the polymer blend formation, and dispersion of TiO2 nano particles in the polymer blend. The modification in surface morphology of polymer blend is due to presence of TiO2 nano particles which was confirmed by SEM results.
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Beake, Ben D., Stephen R. Goodes, James F. Smith, and Fengge Gao. "Nanoscale repetitive impact testing of polymer films." Journal of Materials Research 19, no. 1 (January 2004): 237–47. http://dx.doi.org/10.1557/jmr.2004.19.1.237.

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The deformation of polymer films under repetitive contact at high strain rates was investigated using nanoscale impact testing. Four systems were studied: (i) rubber-modified acrylonitrile-butadiene-styrene (ABS) (0–25 wt% rubber), (ii) uniaxially and biaxially drawn poly(ethylene terephthalate) film; (iii) poly(ethylene oxide)–clay nanocomposites, and (iv) nylon 6–organoclay nanocomposites. The initial results suggest that the technique has much potential in evaluating the fatigue behavior of thinner polymer films and coatings that are unsuitable for conventional methods designed for bulk samples. The extent of impact-induced deformation may be used as a measure of ductility because ductile failures are associated with significant plastic deformation before failure whereas brittle failures usually involve little plastic deformation. The nano-impact technique provides valuable highly localized information about deformation under high strain rate, which is complementary to low strain rate tests such as nanoindentation and nano-scratch. The technique has been shown to be sensitive to nano-/microstructural variations in ABS–rubber film when Berkovich indenters and low impact forces were used. The impact behavior of the nanocomposites is only significantly worse than that of the virgin polymers at the highest clay loading studied (15 wt%). This could be a factor when assessing the suitability of novel nanocomposite materials for applications where toughness is important. On ABS film, there is only an approximate correlation between the plastic work function determined from nanoindentation and the rubber loading in the film while the correlation between the rubber loading and nano-impact data is clear, suggesting that the dynamic test is a more useful predictor of thin polymer film toughness than the slow-loading quasi-static indentation test.
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Yamamoto, Tetsuya, Yuya Takahashi, and Naoya Toyoda. "Dispersion of Nano-materials in Polymer Composite Materials." MATEC Web of Conferences 333 (2021): 11003. http://dx.doi.org/10.1051/matecconf/202133311003.

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Polymer composites materials are the subject of extensive studies because of their novel properties compared with their constituent materials. Dispersion stability of sub-micron sized particles in the medium is important from the point of colloidal views. In the present study, dispersion of nano-materials in the matrix polymer is one of the most important problems to enhance their mechanical properties. We tackled this problem to carry out surface modification of the nano-materials, such as carbon nano tubes (CNTs), using amphiphilic polymers, polyNvinylacetamide (PNVA), synthesized thorough radical polymerization. Hydrogen bond worked between PNVA onto the modified nano-materials and hydrophilic matrix, such as polyvinyl alcohol (PVA), to enhance surface adhesions and dispersions of the nano-materials in the matrix. As a result, the mechanical properties of their composites materials were strengthened. When CNTs were used in PVA, the transparency of the composite was also increased due to improvement of their dispersions. In addition, if the CNTs formed the networks in the composites, the highly conductive and transparent polymer composite films were fabricated.
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Yamamoto, Tetsuya, Yuya Takahashi, and Naoya Toyoda. "Dispersion of Nano-materials in Polymer Composite Materials." MATEC Web of Conferences 333 (2021): 11003. http://dx.doi.org/10.1051/matecconf/202133311003.

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Polymer composites materials are the subject of extensive studies because of their novel properties compared with their constituent materials. Dispersion stability of sub-micron sized particles in the medium is important from the point of colloidal views. In the present study, dispersion of nano-materials in the matrix polymer is one of the most important problems to enhance their mechanical properties. We tackled this problem to carry out surface modification of the nano-materials, such as carbon nano tubes (CNTs), using amphiphilic polymers, polyNvinylacetamide (PNVA), synthesized thorough radical polymerization. Hydrogen bond worked between PNVA onto the modified nano-materials and hydrophilic matrix, such as polyvinyl alcohol (PVA), to enhance surface adhesions and dispersions of the nano-materials in the matrix. As a result, the mechanical properties of their composites materials were strengthened. When CNTs were used in PVA, the transparency of the composite was also increased due to improvement of their dispersions. In addition, if the CNTs formed the networks in the composites, the highly conductive and transparent polymer composite films were fabricated.
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Salikhov, R. B., A. N. Lachinov, R. G. Rakhmeev, R. M. Gadiev, A. R. Yusupov, and S. N. Salazkin. "Chemical sensors based on nano-polymer films." Measurement Techniques 52, no. 4 (April 2009): 427–31. http://dx.doi.org/10.1007/s11018-009-9277-4.

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Dissertations / Theses on the topic "Polymer Nano-films"

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Wang, Xiaoteng. "Directed Nano-Patterning of Polymer Nanocomposite Thin Films." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1462141968.

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Akram, Aisha. "Nano indentation of particulate and polymer films." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249316.

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Hung, Ming-Tsung. "Heat transport in polymer thin films for micro/nano-manufacturing." Diss., Restricted to subscribing institutions, 2007. http://proquest.umi.com/pqdweb?did=1459914931&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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Samadi, Azadeh. "Synthesis and analysis of nano-thin polymer films for separation applications." Connect to this title online, 2009. http://etd.lib.clemson.edu/documents/1247508734/.

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Jin, Weize. "Relative Alignment of CZA (Cold Zone Anneal) Polymer In Nano Imprinted Films." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1430229845.

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Qian, Jiajie. "Control Of C60-POSS Nano Particle Locaiton In DirectedSelf-Assembly of Block Copolymer Thin Films." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1398074026.

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Zhao, Wei. "Flexible Transparent Electrically Conductive Polymer Films for Future Electronics." University of Akron / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=akron1297888558.

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Bodnár, Eszter. "Electrospraying of polymer solutions for the generation of micro-particles, nano-structures, and granular films." Doctoral thesis, Universitat Rovira i Virgili, 2016. http://hdl.handle.net/10803/379820.

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S'ha realitzat un estudi sobre els mecanismes de formació de micropartícules polimèriques i les seves pel•lícules granulars, a partir de l'assecat de microgotes de electrosprays. L'estudi se centra en diferents solucions de tres polímers insolubles en aigua: polimetil(metacrilat), poliestirè, i etil cel•lulosa. L'assecat d'aquests electrosprays dóna lloc a diverses morfologies de partícula, que han estat determinades mitjançant microscòpia d'escombrat electrònic, i han estat caracteritzades en funció del solvent, concentració del polímer, el seu pes molecular, i la humitat relativa ambient. Les morfologies obtingudes inclouen una varietat d'estructures de partícula globulars i filamentoses, que, a humitat relativa elevada, poden desenvolupar porositat. Aquestes característiques morfològiques han estat explicades mitjançant models qualitatius que involucren fenòmens fluid dinàmics i sobre separació de fases, presents en sistemes relacionats amb els estudiats. Un dels fenòmens fluid dinàmics involucrats clau són les inestabilitats coulòmbiques de gotes elèctricament carregades. A més, la interacció de no solvent de l'aigua en la precipitació del polímer pot donar lloc a textures poroses sobre la superfície de les partícules. Les diferents formes de textura han estat explicades en referència als fenòmens de breath figure formation (BFF), i a la inversió de fases induïda per vapor (vapor induced phase separation, o VIPS). També hem estudiat el creixement de les pel•lícules granulars formades a partir de les partícules polimèriques. Demostrem que la càrrega elèctrica transportada per les partícules cap a la pel•lícula influeix fortament en la dinàmica de creixement d’aquesta. Un millor coneixement dels mecanismes estudiats en aquesta tesi hauria de permetre dissenyar nous processos de manufactura de partícules i recobriments basats en electrospray. Se ha realizado un estudio sobre los mecanismos de formación de micropartículas poliméricas y sus películas granulares, a partir del secado de microgotas de electropras. El estudio se centra en diferentes soluciones de tres polímeros insolubles en agua: polimetil(metacrilato), poliestireno, y etil celulosa. El secado de estos electrosprays da lugar a diversas morfologías de partícula, que han sido determinadas mediante microscopía de barrido electrónico, y han sido car
Se ha realizado un estudio sobre los mecanismos de formación de micropartículas poliméricas y sus películas granulares, a partir del secado de microgotas de electropras. El estudio se centra en diferentes soluciones de tres polímeros insolubles en agua: polimetil(metacrilato), poliestireno, y etil celulosa. El secado de estos electrosprays da lugar a diversas morfologías de partícula, que han sido determinadas mediante microscopía de barrido electrónico, y han sido caracterizadas en función del solvente, concentración del polímero, su peso molecular, y la humedad relativa ambiente. Las morfologías obtenidas incluyen una variedad de estructuras de partícula globulares y filamentosas, que, a humedad relativa elevada, pueden desarrollar porosidad. Estas características morfológicas han sido explicadas mediante modelos cualitativos que involucran fenómenos fluido dinámicos y sobre separación de fases, presentes en sistemas relacionados con los estudiados. Uno de los fenómenos fluido dinámicos involucrados clave son las inestabilidades coulómbicas de gotas eléctricamente cargadas. Además, la interacción de no solvente del agua en la precipitación del polímero puede dar lugar a texturas porosas sobre la superficie de las partículas. Los diferentes tipos de texturas han sido explicadas en referencia a los fenómenos de breath figure formation (BFF), y a inversión de fases inducida por vapor (vapor induced phase separation, o VIPS). También hemos estudiado el crecimiento de las películas granulares formadas a partir de las partículas poliméricas. Demostramos que la carga eléctrica transportada por las partículas hacia la película influye fuertemente en la dinámica de crecimiento de ésta. Un mejor conocimiento de los mecanismos estudiados en esta tesis debería permitir diseñar nuevos procesos de manufactura de partículas y recubrimientos basados en electrospray.
A study has been made of the mechanisms underlying the formation of polymeric microparticles and of their granular films, by drying of electrospray microdroplets. The study is focused on different solutions of three water-insoluble polymers: polymethyl(methacrylate), polystyrene, and ethyl cellulose. The drying of such electrosprays result in diverse particle morphologies, which have been determined by scanning electron microscopy, and have been characterized as a function of the solvent, polymer concentration, polymer molecular weight, and ambient relative humidity. The morphologies obtained include a variety of globular and filamented particle structures, which, at elevated relative humidity, can develop porosity. These morphological features have been explained using qualitative models involving fluid dynamic and phase separation phenomena which are known to occur in closely related systems. One of the key fluid dynamic phenomena involved is the coulombic instability of electrically charged droplets. In addition, the non-solvent interaction of water on the precipitation of the polymer can lead to porous textures on the particles surfaces. The different kinds of textures have been explained by reference to breath-figure formation (BFF) and vapor induced phase separation (VIPS) phenomena. We have also studied the growth of the granular films of such polymer particles. We show that the electrical charge transported by the particles to the film have a strong influence on the film growth dynamics. The better understanding of the mechanisms studied in this thesis, should help design new manufacturing processes of particles and coatings based on electrospray.
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Mabuchi, Michiaki. "Nano-Structure and Thermal Relaxation of Ultrathin Polymer Films Prepared by the Langmuir-Blodgett Technique." Kyoto University, 1998. http://hdl.handle.net/2433/182337.

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Masclaux, Céline. "Etude de la structuration spontanée de films polymères en nano-impression thermique." Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENT034/document.

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La lithographie de nano-impression par déstabilisation spontanée de polymère est unevariante de la technique de nano-impression thermique, et permet de limiter le contact directentre moule et polymère. Le but de cette thèse est d’étudier cette déstabilisation spontanée etde déterminer si elle peut conduire à la formation de nanostructures en dupliquant de façonpositive un moule nano-structuré. Ce procédé est influencé, en particulier, par la température,le champ électrique externe ou interne au niveau des interfaces moule – air – polymère, ainsique par la distance d séparant les structures du moule et la surface du polymère.Les études réalisées au cours de cette thèse se sont concentrées sur l’influence de cesdifférents paramètres. Nous avons montré que la formation de motifs dépend plus de l’effetde charges que de la température, dans la mesure où le polymère peut néanmoins fluer. Nousavons surtout mis en évidence le scénario de structuration suivant : une duplication positiveapparaît dans un premier temps, et est suivie, dans certains cas, d’un remplissage des cavitésdu moule conduisant à une duplication négative. Un modèle théorique a été utilisé pourcalculer la longueur d’onde de déstabilisation la plus favorable, et une comparaison avec nosrésultats expérimentaux a permis d’expliquer pourquoi et dans quels cas la structurationfinale est positive ou négative. Une investigation a été accomplie sur la déstabilisationspontanée de substrats souples, mais la grande épaisseur des films conduit à unedéstabilisation de grande longueur d’onde, et donc à un remplissage complet du moule
NanoImprint lithography by spontaneous polymer destabilization is an alternative toThermal NanoImprint, which limits physical contact between polymer and mold surfaces.The purpose of this thesis is to investigate this spontaneous destabilization and to work out ifit can lead to the formation of nanostructures by duplicating positively a structured mold.This process is in particular affected by temperature or electric field present at mold - air -polymer interfaces and by the distance d between the structures of the mold and the polymersurface.The studies of this thesis were focused on the influence of these process parameters. Itwas shown that the structuration depends more of charges’ effect than temperature, since thepolymer can creep. We highlighted the following scenario of structuration: a positiveduplication appears first and is followed, in some cases, by the filling of the mold cavitiesleading to a negative duplication. A theoretical model was used to calculate the mostfavorable destabilization wavelength, and a comparison with experimental results helped toexplain why and under which circumstances the final structuration is positive or negative. Aninvestigation was performed on the spontaneous destabilization of flexible substrate but thebigger thickness of flexible films led to a destabilisation with a wide wavelength and so tothe filling of molds’ cavities
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Books on the topic "Polymer Nano-films"

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1954-, Nalwa Hari Singh, ed. Handbook of organic-inorganic hybrid materials and nanocomposites. Stevenson Ranch, Calif: American Scientific Publishers, 2003.

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Rai, Mahendra, and Carolina Alves Dos Santos. Bio-Polymer-Based Nano Films: Applications in Food Packaging and Wound Healing. Elsevier, 2021.

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Nalwa, Hari Singh. Handbook of Organic-Inorganic Hybrid Materials and Nanocomposites, Vols. 1 and 2. American Scientific Publishers, 2003.

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Book chapters on the topic "Polymer Nano-films"

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Jang, Yeongseon, Bongjun Yeom, and Kookheon Char. "Hybrid Multilayer Films Containing Nano-Objects." In Functional Polymer Films, 933–60. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527638482.ch30.

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Cakmak, Hulya, and Ece Sogut. "Functional Biobased Composite Polymers for Food Packaging Applications." In Reactive and Functional Polymers Volume One, 95–136. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-43403-8_6.

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AbstractBiobased polymers are of great interest due to the release of tension on non-renewable petroleum-based polymers for environmental concerns. However, biobased polymers usually have poor mechanical and barrier properties when used as the main component of coatings and films, but they can be improved by adding nanoscale reinforcing agents (nanoparticles - NPs or fillers), thus forming nanocomposites. The nano-sized components have a larger surface area that favors the filler-matrix interactions and the resulting material yield. For example, natural fibers from renewable plants could be used to improve the mechanical strength of the biobased composites. In addition to the mechanical properties, the optical, thermal and barrier properties are mainly effective on the selection of type or the ratio of biobased components. Biobased nanocomposites are one of the best alternatives to conventional polymer composites due to their low density, transparency, better surface properties and biodegradability, even with low filler contents. In addition, these biomaterials are also incorporated into composite films as nano-sized bio-fillers for the reinforcement or as carriers of some bioactive compounds. Therefore, nanostructures may provide antimicrobial properties, oxygen scavenging ability, enzyme immobilization or act as a temperature or oxygen sensor. The promising result of biobased functional polymer nanocomposites is shelf life extension of foods, and continuous improvements will face the future challenges. This chapter will focus on biobased materials used in nanocomposite polymers with their functional properties for food packaging applications.
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Voit, B., F. Braun, Ch Loppacher, S. Trogisch, L. M. Eng, R. Seidel, A. Gorbunoff, W. Pompe, and M. Mertig. "Photolabile Ultrathin Polymer Films for Spatially Defined Attachment of Nano Elements." In ACS Symposium Series, 118–28. Washington, DC: American Chemical Society, 2004. http://dx.doi.org/10.1021/bk-2004-0874.ch009.

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Kwon, Min Hee, Dong Kyu Han, Si Joong Kwon, and Jin Yeol Kim. "Fabrication and Micropatterning of Conducting Polymer Nano-Films for Electronic Displays." In Solid State Phenomena, 591–94. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-31-0.591.

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Das, Raj, and Avishek Chanda. "Fabrication and Properties of Spin-Coated Polymer Films." In Nano-size Polymers, 283–306. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-39715-3_10.

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Sukhorukov, Gleb B. "Designed Nano-Engineered Polymer Films on Colloidal Particles and Capsules." In Studies in Interface Science, 383–414. Elsevier, 2001. http://dx.doi.org/10.1016/s1383-7303(01)80035-1.

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Dziike, Farai, Phylis Makurunje, and Refilwe Matshitse. "Biomass Electrospinning: Recycling Materials for Green Economy Applications." In Electrospinning - Material Technology of the Future [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.103096.

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The development and advancement of electrospinning (ES) presents a unique material technology of the future achieved by fabricating novel nanofibrous materials with multifunctional physical (three-dimensional [3D] structure, nanoscalable sizes) and chemical characteristics (functional groups). Advancing the possibility of preparing various classes of novel organic and inorganic electrospun fiber composites with unique features such as polymer alloys, nanoparticles (NPs), active agents, and devices. This feature gives provision for internal access of the setup parameters such as polymer precursor material, polymer concentration, solvent, and the method of fiber collection that consequentially improves the intrinsic control of the construction mechanism of the final nanofibrous architecture. In synthetic electrospinning, the nanofibrous material processing allows for internal control of the electrospinning mechanism and foster chemical crosslinking to generate covalent connections between polymeric fibers. Comparing technologies according to materials of the future revealed that electrospinning supports the formation of micro-scale and in some cases nano-scale fibers while the formation of thin films is facilitated by the electrospraying system. Recent innovations point to various biomass waste streams that may be used as an alternative source of polymeric materials for application in electrospinning to produce materials for the future.
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Srinivasarao, Mohan, Jung Ok Park, Vivek Sharma, Lulu Song, Matthew S. Barrow, and P. Rhodri Williams. "FABRICATION OF NANO/MICROSTRUCTURED ORGANIC POLYMER FILMS USING CONDENSATION: SELF-ASSEMBLY OF BREATH FIGURES." In Evaporative Self-Assembly of Ordered Complex Structures, 235–93. WORLD SCIENTIFIC, 2012. http://dx.doi.org/10.1142/9789814304696_0006.

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Sancakoglu, Orkut. "Technological Background and Properties of Thin Film Semiconductors." In 21st Century Surface Science - a Handbook. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.91751.

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Especially with the development of nanotechnology and polymer science, interest in research and production of both efficient and lower-cost semiconductor thin film materials is increasing day by day. The use of nano-structured thin films for efficient use of solar cells in production of n-type semiconductor materials is one of the most important sources of energy and new-generation energy. Considering the indicated trends and energy requirements, it has been important to transfer this technology in detail regarding the surface technologies related to the semiconductor materials produced with thin film technologies instead of bulk materials. With this aim, this book chapter “Technological Background and Properties of Thin Film Semiconductors” includes a brief story about semiconductors, band gap theory, thin film applications, and besides traditional thin film processing methods finally a new technology called aerosol deposition technique which allows room temperature processing of several materials for semiconductor applications, respectively. It is thought that it will make important contributions to the relevant field and bring a new perspective and direct scientific research in “process-structure–property-performance” relation.
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Raghavan, Srinivasa. "TiO2 Nanostructures by Sol–Gel Processing." In Sol-Gel Method - Recent Advances [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.111440.

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This book chapter discusses the versatile sol–gel processing technique that has been used to synthesize the nanostructures of titanium dioxide (TiO2) and their different morphologies. The sol–gel syntheses of different nanostructures of TiO2, namely TiO2 nanoparticles, nanocrystalline thin film, nanorods, nanofibers, nanowires, nanotubes, aerogels, and opals are described. These nanostructures have been characterized by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) whose images clearly depict the formation of the nanostructures. Some of the morphologies of nano-TiO2 such as nanorods, nanotubes, nanofibers, nanowires, have been synthesized by sol–gel process in combination with spin-coating, dip-coating, template, surfactant, diblock polymer, micelles, polystyrene. In comparison to the bulk TiO2, presence of porous and nanocrystalline morphologies has played a role in enhancing the performance in applications such as photovoltaics, photocatalysis, photocatalytic water-splitting, H2 storage, gas sensors, photochromic, opto-electronic, and electrochromic devices. The chapter concludes with challenges and practical concerns in using the sol–gel process to produce thin films of complex oxides, porous nanostructures, solid nanorods, nanotubes, which need to be addressed in future research efforts.
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Conference papers on the topic "Polymer Nano-films"

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Sibanda, Charmaine, Gurthwin Bosman, and Erich Rohwer. "Diffusivity of single fluorescent probes embedded in thin polymer films." In JSAP-OSA Joint Symposia. Washington, D.C.: Optica Publishing Group, 2017. http://dx.doi.org/10.1364/jsap.2017.6p_a409_2.

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Photophysics and photochemistry in polymer science has been central areas of interest in understanding the structure and dynamics of polymers. The physical properties of polymers especially the dynamical properties close to the phase transition from rubbery to the glassy state are complex and have not been completely understood despite experimental and theoretical studies over the past decades [1]. Understanding the dynamics of polymer nano environments is highly crucial for numerous technological applications in various industrial and biomedical sectors related to protective and functional coatings and biocompatibility of medical implants [2]. The diffusivity of single probes embedded in thin polymer films can exhibit unusual physical properties due to geometric constraints imposed by the presence of surfaces and interfaces and using single molecule fluorescence microscopy as an imaging technique, allows one to look at the microscopic processes on the nanometer scale [3]. For this research single nanoparticles were embedded in thin polystyrene (PS) and poly (isobutyl methacrylate) (PIMA) films, some of these polymeric films were relaxed and the others were non-relaxed in order to study nano scale polymer dynamics that affect the diffusivity of the single nanoparticles. The diffusivity of the single nanoparticles helps to study the molecular dynamics in thin polymeric films and how these molecular dynamics are related to the glass transition of the thin polymer films. The molecular dynamics include the relaxation processes in polymers such as the α-relaxation, which is believed to contribute to the heterogeneity motion of the single nanoparticles as the temperature of the polymer film is increased towards the glass transition temperature.
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Ahuja, Suresh. "Interface and Dynamic Indentation of Crosslinked Polyester Films." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-67693.

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Nano-indentation is increasingly used to estimate the mechanical properties of polymeric films of nanometer-scale thickness. Hardness and modulus, as obtained on indentation are parameters that are strongly dependent upon tip geometry, elastic and inelastic material behavior, and specimen boundary conditions. The objective of this study was to analyze the mechanical response of nano-indentation loading on surfaces and interfaces of polymer films both linear and cross-linked. Polymer films on nano-indentation show confinement effect on their modulus and hardness. Reduced modulus and hardness in polyester and polycarbonate show strain softening that is associated polymer chain flexibility. The spatial constraints imposed to the plastic flow of the interface layer by the rigid indenter and substrate surfaces produce a dynamic effect, demonstrated by the loading rate dependence of the deformation response. In nano-indentation of cross-linked polymers, entanglements physical and chemical affect reduced modulus and hardness dependence on strain. Strain softening and strain hardening as well as dynamic frictional response are applied to indented polymer films consisting of surface, intermediate, and interface layers.
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Lewis, Ryan, Julie Slaughter, and Y. C. Lee. "Improved Flexibility of Alumina Ultrathin Barrier Films by Nano-Lamination." In ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems collocated with the ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ipack2015-48503.

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Ultra-thin ceramic films deposited by atomic layer deposition (ALD) can provide an excellent oxygen and moisture barrier for diverse applications, such as organic light emitting devices, micro heat pipes, vacuum packaging, and flexible electronics. Due to their nano-scale thickness, these films exhibit a certain degree of flexibility despite being ceramic. Above a critical strain, the ALD films will crack, and this cracking has been shown to be governed by a fracture mechanics model. This paper shows the critical cracking strain of Al2O3 deposited on polymers can be improved by incorporating the ceramic film into a nano-laminate (NL) structure, with alternating layers of ALD Al2O3 and a compliant polymer film. We find that the critical cracking strain depends on the elastic modulus of the polymer film. We experimentally demonstrate a factor of 2 improvement in critical cracking strain using an 8-layer polymer/ALD NL, with 3 different polymers, independent of the polymer thickness.
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Yang, Qingzhen, Ben Q. Li, and Yucheng Ding. "Electrohydrodynamic Patterning of Micro/Nano-Structures on Thin Polymer Films." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-64471.

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Electrohydrodynamic (EHD) patterning provides an alternative to fabricate the controllable polymeric micro/nano-structures, which have wide applications in industry. Both steady state and dynamic development of EHD patterning structures are discussed in this paper. For the steady state modeling, a discontinuous boundary element coupled with finite element method is applied. Numerical results reveal that a critical voltage exists, below which a small amplitude structure is obtained and above which polymer evolves into patterns with a large height/width ratio. The transient process of EHD patterning is represented by the numerical solution of the phase field equation coupled with the electric field and Navier-Stokes equation. The computer model is capable of describing the dynamic development of the electrically-induced transport and surface deformation phenomena during EHD patterning. The coupled multi-field equations are discretized in finite difference with an enhancement by parallel computing. For structured templates, the application of an electric field creates the conformal structures in the polymer film with the periodicity and aspect ratios of the polymer structures controlled by template patterns and applied electric fields. Analysis indicates that the interaction between the applied field and the fluids leads to an occurrence of complex flow structures and free surface deformation and plays an important role in determining the dynamics of an EHD patterning process.
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Chae, Sang Min, See Wo Lee, Kuk Hyun Jo, Ji Yeon Choi, Hyun Hwi Lee, and Hyo Jung Kim. "Novel process for nano-structuring of conducting polymer thin films." In 2015 11th Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR). IEEE, 2015. http://dx.doi.org/10.1109/cleopr.2015.7375949.

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Kishore, Sangeeta, Dolly Singh, N. L. Singh, Alka B. Garg, R. Mittal, and R. Mukhopadhyay. "Conductivity Studies of PEO based Polymer Nano-Composite Electrolyte Films." In SOLID STATE PHYSICS, PROCEEDINGS OF THE 55TH DAE SOLID STATE PHYSICS SYMPOSIUM 2010. AIP, 2011. http://dx.doi.org/10.1063/1.3606215.

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Verma, Gaurav, Anupama Kaushik, Anup K. Ghosh, S. K. Tripathi, Keya Dharamvir, Ranjan Kumar, and G. S. S. Saini. "Interaction of Nano-Sized Materials With Polymer Chains in Polymer-Nanocomposite Thin Films-An AFM Perspective." In INTERNATIONAL CONFERENCE ON ADVANCES IN CONDENSED AND NANO MATERIALS (ICACNM-2011). AIP, 2011. http://dx.doi.org/10.1063/1.3653767.

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Divya, S., G. Saipriya, and J. Hemalatha. "Preparation and characterization of PVP-PVA–ZnO blend polymer nano composite films." In DAE SOLID STATE PHYSICS SYMPOSIUM 2015. Author(s), 2016. http://dx.doi.org/10.1063/1.4947743.

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Chanda, Anupama, Nabajyoti Rajkonwar, Khalid Bin Masood, Jai Singh, and Prashant Shukla. "Study of bio-polymer derived graphene oxide-ZnO nano-composite thin films." In 3RD INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC-2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0001315.

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Takahashi, Yusuke, Kwok Siong Teh, and Yen-Wen Lu. "Fabrication and Characterization of Nano-Structuring Polymeric Surfaces for MEMS Applications." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68893.

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Using external stimuli to control surface properties, such as surface topology or wettability, has been of great interest. This paper presents the fabrication, mechanism, and analysis of an active method that modulates surface nano-topology and wettability of polymeric films. The polymeric film possesses the unique property of electrical potential-induced wettability conversion: when its doping level is electrically altered, the interstitial ions are incorporated or released, causing the polymer network to stretch and thereby changing its surface morphology.
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Reports on the topic "Polymer Nano-films"

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Barnes, Eftihia, Jennifer Jefcoat, Erik Alberts, Hannah Peel, L. Mimum, J, Buchanan, Xin Guan, et al. Synthesis and characterization of biological nanomaterial/poly(vinylidene fluoride) composites. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/42132.

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The properties of composite materials are strongly influenced by both the physical and chemical properties of their individual constituents, as well as the interactions between them. For nanocomposites, the incorporation of nano-sized dopants inside a host material matrix can lead to significant improvements in mechanical strength, toughness, thermal or electrical conductivity, etc. In this work, the effect of cellulose nanofibrils on the structure and mechanical properties of cellulose nanofibril poly(vinylidene fluoride) (PVDF) composite films was investigated. Cellulose is one of the most abundant organic polymers with superior mechanical properties and readily functionalized surfaces. Under the current processing conditions, cellulose nanofibrils, as-received and 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) oxidized, alter the crystallinity and mechanical properties of the composite films while not inducing a crystalline phase transformation on the 𝛾 phase PVDF composites. Composite films obtained from hydrated cellulose nanofibrils remain in a majority 𝛾 phase, but also exhibit a small, yet detectable fraction of 𝛼 and ß PVDF phases.
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